Alfonso Soriano hit a two-run homer in the eighth inning and Chicago completed a three-game sweep of the Pittsburgh Pirates with a 4-2 win on Sunday.Soriano followed Anthony Rizzo's leadoff single in the eighth with his second homer in as many days, sending the first pitch from Jason Grilli (1-6) into the Cubs bullpen in left-center.Chicago is 6-20 on the road since the All-Star break, with five of those wins coming at PNC Park. The Cubs had lost eight consecutive road games when they arrived in Pittsburgh.Andrew McCutchen homered and Brock Holt had three hits for the Pirates, who have lost seven of nine and continue their freefall out of contention.Pittsburgh (72-67) peaked at 16 games over .500 this season but now needs to go 9-14 to avoid extending their record of consecutive losing seasons to 20. Pittsburgh is 9-20 since Aug. 8.The Pirates will play three games at the Reds starting Monday. The previous time Pittsburgh played in Cincinnati Aug. 3-5, it entered trailing by 3 1/2 games in the NL Central. Five weeks later, the Pirates are in third place and 11 back.Pittsburgh loaded the bases with one out in the ninth, but Cubs closer Carlos Marmol struck out Gaby Sanchez and got Pedro Alvarez to fly out to left to earn his 18th save.Chicago's Chris Rusin allowed one run on five hits with four strikeouts in five innings. He left the game in line for his first victory, but the Pirates tied it in the seventh when Holt scored on a balk by James Russell (7-1).Pittsburgh's Jeff Locke gave up solo homers to Josh Vitters and Anthony Recker in the fourth but overall scattered seven hits over six innings.15467256

PITTSBURGH —

Alfonso Soriano hit a two-run homer in the eighth inning and Chicago completed a three-game sweep of the Pittsburgh Pirates with a 4-2 win on Sunday.

Soriano followed Anthony Rizzo's leadoff single in the eighth with his second homer in as many days, sending the first pitch from Jason Grilli (1-6) into the Cubs bullpen in left-center.

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Chicago is 6-20 on the road since the All-Star break, with five of those wins coming at PNC Park. The Cubs had lost eight consecutive road games when they arrived in Pittsburgh.

Andrew McCutchen homered and Brock Holt had three hits for the Pirates, who have lost seven of nine and continue their freefall out of contention.

Pittsburgh (72-67) peaked at 16 games over .500 this season but now needs to go 9-14 to avoid extending their record of consecutive losing seasons to 20. Pittsburgh is 9-20 since Aug. 8.

The Pirates will play three games at the Reds starting Monday. The previous time Pittsburgh played in Cincinnati Aug. 3-5, it entered trailing by 3 1/2 games in the NL Central. Five weeks later, the Pirates are in third place and 11 back.

Pittsburgh loaded the bases with one out in the ninth, but Cubs closer Carlos Marmol struck out Gaby Sanchez and got Pedro Alvarez to fly out to left to earn his 18th save.

Chicago's Chris Rusin allowed one run on five hits with four strikeouts in five innings. He left the game in line for his first victory, but the Pirates tied it in the seventh when Holt scored on a balk by James Russell (7-1).

Pittsburgh's Jeff Locke gave up solo homers to Josh Vitters and Anthony Recker in the fourth but overall scattered seven hits over six innings.